Delbert Grady has to be in the final photo. This is totally overlooked by many but so important; if Grady is a real spirit haunting The Overlook he would be in the final photo as he's the highest ranking "ghost" and actually succeeded in killing his family. He even says, “I'm sorry to differ with you, sir, but you are the caretaker. You have always been the caretaker, I should know, sir. I've always been here.” If he has in fact “always been” in The Overlook than he must also be in the final photo and he, like when we see Jack, must look exactly the same. He obviously isn’t in the final photo and this has only one explanation; he hasn't "always been" there as he's a product of Jack’s imagination. A person suffering from cabin fever. Just a sick man's vision and not a real board certified, "ghost".